Saw blade for cutting fiber cement
First Claim
1. A saw blade for cutting fiber cement, comprising:
- a circular saw blade blank defining a circumferential rim, and a plurality of gullets formed in said rim and said gullets adjacent a plurality of saw tip shoulders formed in said rim;
a saw blade tip mounted on each saw tip shoulder; and
a kerf chip and dust minimizer formed in said rim, said minimizer including at least one radially extending member adjacent a plurality of radially recessed members, said minimizer located proximate each gullet.
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Accused Products
Abstract
An improved circular saw blade designed for cutting fiber cement workpieces, which are becoming more and more prevalent on the construction site, includes a PCD/carbide tip (16) mounted in the rim (31) of the saw blade (10) at six, rather than the usual for locations, equally spaced around the blade. The tips are mounted adjacent a relatively large-diameter, semi-circular gullet (20), which itself is preceded by a chip and dust minimizer (18). The minimizer includes several alternating hills (52) and valleys (54) formed in the rim of the saw blade, each hill and valley having the same radius, producing a sinuous array essentially centered on the rim of the blade. It has been discovered that such a dust and chip minimizer reduces the level of dust and chips produced by the blade and clears the same from the kerf generated in the blade-workpiece interface. Ideally, all of the parameters and relief angles for the surfaces on the saw blade tip can be generated by cutting an array of such tips from a large-diameter blank (110) of PCD fused to a layer of tungsten carbide (72), and by mounting the tips onto the blade in such an orientation as to present, preferably, a negative hook or rake angle (74) to the workpiece.
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Citations
20 Claims
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1. A saw blade for cutting fiber cement, comprising:
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a circular saw blade blank defining a circumferential rim, and a plurality of gullets formed in said rim and said gullets adjacent a plurality of saw tip shoulders formed in said rim; a saw blade tip mounted on each saw tip shoulder; and a kerf chip and dust minimizer formed in said rim, said minimizer including at least one radially extending member adjacent a plurality of radially recessed members, said minimizer located proximate each gullet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification